The phrase "more super-duper" is already at the top of the scale when it comes to describing something excellent or outstanding. However, there are still antonyms that could be used in place of this phrase to describe something that is not as exceptional or noteworthy. Some antonyms for "more super-duper" include mediocre, average, ordinary, run-of-the-mill, and substandard. These words imply that a particular thing or situation lacks the outstanding quality that something described as "super-duper" possesses. Although these antonyms may seem negative, they serve as descriptive words that help us differentiate what is impressive and what is not.